A new type of STATCOM based on cascading voltage-source inverters with phase-shifted unipolar SPWM

被引:228
作者
Liang, YQ [1 ]
Nwankpa, CO
机构
[1] ALSTOM Drives & Controls, Pittsburgh, PA 15238 USA
[2] Drexel Univ, Dept Elect & Comp Engn, Philadelphia, PA 19104 USA
关键词
phase-shifted sinusoidal pulsewidth modulation; static compensator; voltage-source inverter;
D O I
10.1109/28.793373
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In this paper, a new type of static compensator (STATCOM) is proposed. This new STATCOM is constructed by cascading several identical full-bridge (H bridge) voltage-source inverters (VSI's). A so-called phase-shifted sinusoidal pulsewidth modulation (SPWM) unipolar voltage switching scheme is applied to control the switching devices of each VSI. The harmonics in STATCOM current caused by the de voltage ripple is rejected by a new method developed in this paper. As a result, the size of inductor and de capacitors can be further reduced. A very effective startup procedure is proposed to start up the STATCOM, The proposed STATCOM has the advantage of a fewer number of VSI's, the VSI's being identical and extremely fast in response to reactive power change.
引用
收藏
页码:1118 / 1123
页数:6
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